Read JSON

#include <iostream>
#include <nlohmann/json.hpp>
#include <iomanip>
#include <vector>
#include <fstream>

using json = nlohmann::json;
int readJSON(){
  std::ifstream is("i_data.json");
  json i_data;
  is >> i_data;
  std::vector<std::string> ids = i_data["id"];
  std::vector<int> counts = i_data["count"];
  return 0;
}